Jar top



April 10, 1928.

- N. G. NETHERLAND JAR TOP Filed NOV. 13, 1926 SHAW/Vito! G. Feflwrlandenema A t. 10, 1928.

PATENT ornce.

RITA. G. KETHEBLAND, OI BALLSVILLE, VIRGINIA.

JAB TOR;

Application filed November This invention relates to improvements inscrew jar tops and has for an object to provide such a top, adapted tobe used with jars of a popular type having a top which carries a a screwthread, which is cheap to Jnanufacture, may be.easily gripped to turnwhen being applied to or removed from such a jar, and which has certainadvantages pe-. culiar to its construction which enable it to securelygrasp the threads of the jar after being seated.

A further object is to provide in such a jar top novel features in theformation of the screw-thread-carrying skirt portion to the end thateven when most firmly seated the top maybe readily started from suchposition, each successive impulse of turning momentarily loosening thethreads so that the friction between the threads of the top and thethreads of the jar is decreased during the turnin impulse. v

A further 0 ject is to provide a jar top having these advantages'withthe additional advanta e of the lip portion contacting with the usualrubber jar ring, the lip portion being associatedvwith the resilientskirt portion in such manner that while the top is being turned frictionbetween the lip and jar rubber is lessened; but when the movement ofturning ceases,as when the top is screwed down against the jar rubber,the resilient skirt members being drawn together by their novelstructure wedge against the rubber ring and form. an eflicient seal.With hese and other objects in view as may becomeapparent from thefollowing disclosure, the invention consists in the novel combination ofelements, construction and arrangement of parts, operation and specificfeatures to be hereinafter enlarged upon, and recited in" the subjoinedclaims, the invention being'illustrated in the accom panying drawings,wherein Figure 1 is a accordance with my invention:

Figure 2 is an elevation: Figure 3 is a plan section: Figure 4 is afragmentary section taken on a plane vertical to the plane of Fig; 3:

Figure 5 is a section of another form: Figure 6 is a section of stillanother modified orm: Figure 7 is fragmentary plan of Fig.

F1gure8 is' a. plan in section of still- 5 another form: and

i Figure!) anillustration of one method plan; of a jar top made in13,1926. Serial in. learn.

of using the intermediate resilient or humped portions of the top as agrip for fingers or tool in assisting turning of the jar top.

Referring to the drawings A represents a popular form of preserving jar,and B a metallic top. The skirt the 'usual screw thread 5 adapted tocoact with the screw threads 6 formed on the top edge of the jar.

The. skirt portion comprises a pluralitrv of arcuate sections, threesuch sections X, and Z, being illustrated. Intermediate these sectionsare humped portions 7, 8, and -9, as shown in Figures 1, 3, and 8. Thesemay be of varying form in section as illustrated, and when most tightlycrimped as in the forms 8 and 9, are best suited to coact with thearcuate sections as will be pointed out.

portion S carries The hump, or crimped portion extends from the plane ofthe top of the jar top to the plane of the lip 10, as shown in Figure isno contact of the threads, the pressure of the crimped lip against therubber ring berelied upon to form aseal at this point.

When screwingthe top down upon its seat on the ring pressureappliedtangentially to the jar top to rotate it tends to loosen the gripof the threads of the segment in advance of the crimp so that lesseffort is required tojturnthe jar top down to its seat.

When pressure is withdrawn from the crimp the segments readjustthemselves and i 1 grip the threadsof the top of the jar.

' This tendency of the sklrt to expand when a turning force is applied,causes the lip 1 e r and when the turning force is withdrawn and theskirt gathers itself together, it. further compresses the ring beneathit to wedge it between the lip and the top of the jar, along the extentofthe are.

and gat-her in the rubber ring,

* :n; other words, when tightenin -gar looseningythe top, the threesegmentsof the skirt, joined by the doubled over, or

crimped, knobs, become to a slight extent relatively movable to increasethe radius of the skirt at the momentof turning. The

intermediate humped portions are adapted -t0' be gripped to aid inturning the jar top,

only ccrt-ainpossible modifications it-willbe D appreciated that inpractice I do not limit myself to such specific details as herein seteee oos forth; but may resort to any practical modifications fallingwithin the scope of the claim.

What I claim is: A screw-jar cover having a 7 comprising" a' pluralityof screw. threaded *gripping arcs and a lip, and resilientmeansintermediate said arcsand extending entlrely across the-skirt and 11p,said resilient means being formed by crii nping: portions of-the skirtand lip transversely of the screw threads. r .j '7 In testimony whereofI aflix, my signature.

mm G. NETHERLAND- skirt portion-

